Diigo - free upgrade to an educator account available. Web2.0 tool that allows you to bookmark websites and then highlight text, create sticky notes, tag them, share them and collaborate with others. With the educator account, you can create classes that enable students to collaborate with each other. I'm in the process of figure out exactly how this all works, if anyone else would like to sign up for an account and try it with me.
http://www.diigo.com/

Join an online collaboration network to share pathfinders. Created by Joyce Valenza. Be aware that the opening page on this wiki is an education glog. Some users may have trouble accessing it at school if Glogster is blocked.
http://pathfinderswap.wikispaces.com/
posted by Donna Baratta 6/19/10

Story Jumper A free account to create ebooks: upload images and text, with the ability to save, share, print, and for a price have it printed as a hardcover book. Site allows user on teacher accounts to create a classroom use and gives unique user names. Found on Discovery Education site. Some of my teachers are interested in collaborating on Small Moments stories using this tool. Seems an easier process than what I saw at a recent workshop.
[Chris Eidem, Chappaqua, 11/19/10]